Will Gompertz: "It's not a classic Turner Prize year"

The Turner Prize is announced tonight. A prize of £25,000 awaits the winner of the prize aimed at celebrating the best in contemporary British art.

Contenders this year are Duncan Campbell, Ciara Phillips, James Richards and Tris Vonna-Michell. But who will come out on top?

The BBC Arts Editor Will Gompertz casts his eye over the contenders, but told BBC Radio 4's Today programme he didn't think it was the strongest field.